24. NCERT Exemplar XV

 

Water-logged soil produces less nitrogenoxygencarbon for plants to respirate and affects their growth.

The primary function of stemsrootsleaves includes water absorption and uptake of oxygen from the pore space of the soil.
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In ordinary soil, oxygen from the pore spaces moves into the rootsleavesstems.​

However, water occupies the spacesmovesforces between soil particles and pushes the oxygennitrogencarbon out into the atmosphere in water-logged soil. 

So, continuously water-logged soils are disadvantageous for rootsstemsplant growth.